# Chapter R - Elementary Algebra Review - R.1 Introduction to Algebraic Expressions - R.1 Exercise Set: 36

$720$

#### Work Step by Step

Using the order of operations on real numbers, the given expression, $(-6)\cdot(-5)\cdot(-4)\cdot(-3)\cdot(-2)\cdot(-1) ,$ evaluates to \begin{array}{l}\require{cancel} 30\cdot(-4)\cdot(-3)\cdot(-2)\cdot(-1) \\\\= -120\cdot(-3)\cdot(-2)\cdot(-1) \\\\= 360\cdot(-2)\cdot(-1) \\\\= -720\cdot(-1) \\\\= 720 .\end{array}

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